Assessment of oxygen in gallium arsenide by infrared local vibrational mode spectroscopy
1989; American Institute of Physics; Volume: 54; Issue: 15 Linguagem: Inglês
10.1063/1.100691
ISSN1520-8842
AutoresJ. Schneider, B. Dischler, H. Seelewind, P. M. Mooney, J. Łagowski, M. MATSUI, Darren R. Beard, R.C. Newman,
Tópico(s)Crystal Structures and Properties
ResumoTwo infrared local vibrational mode (LVM) absorption lines occurring at 715 and 845 cm−1 shift to 679 and 802 cm−1 in gallium arsenide doped with 18O, proving that the lines arise from the vibrations of oxygen impurities. The 715 cm−1 line exhibits a triplet 69,71Ga isotope fine structure consistent with that expected from a quasi-substitional VAs-O center. The 845 cm−1 line appears as a closely spaced doublet expected for a bonded interstitial oxygen atom.
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